Melt 100g of marg/butter. Let it cool slightly before adding 100ml of milk, 150ml of sour cream, and 2 whisked eggs.Add in 130g of soft brown sugar and 300g of plain flour. Add 1 tsp of bicarb and 2 tsp of baking powder.Add in a punnet of raspberries and bush up a little. Lastly add in chunks of white chocolate..depending on how chocolately you want them!Sprinkle with brown sugar and cook in muffin cases for 25 mins at gas mark 6 or 180 degrees.